Question

( Click on the photo to see fully)

How does this create two “congruent” right angle triangles when i thought it had to be similar in 3 ways to be congruent

Answer 1

Though these segments aren't marked congruent in the diagram, the two lines inside the circle making up the bases of the triangles are congruent as all radii are congruent. So the triangles are congruent by SAS.